CN202243441U - Hydraulic load-sensing proportional valve used for vehicle brake system - Google Patents
Hydraulic load-sensing proportional valve used for vehicle brake system Download PDFInfo
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- CN202243441U CN202243441U CN201120309131XU CN201120309131U CN202243441U CN 202243441 U CN202243441 U CN 202243441U CN 201120309131X U CN201120309131X U CN 201120309131XU CN 201120309131 U CN201120309131 U CN 201120309131U CN 202243441 U CN202243441 U CN 202243441U
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Abstract
The utility model relates to a hydraulic load-sensing proportional valve used for a vehicle brake system. The hydraulic load-sensing proportional valve is characterized by comprising a valve shell, wherein the valve shell is provided with a pressure input port, a pressure port and a pressure output port; the pressure port is communicated with a front brake pipeline; the pressure output port is communicated with a rear brake pipeline; a valve element is arranged in the valve shell and divides the valve shell into a pressure input cavity communicated with the pressure input port and a pressure output cavity communicated with the pressure output port; a pressure limiting rubber ring is sleeved on the valve element and can block or communicate the pressure input cavity and the pressure output cavity by the left and right movement of the valve element; a valve element bush is sleeved on the valve element; a spring keeping the valve element being far away from the valve element bush is sleeved on the valve element; and an independent pressure cavity communicated with the pressure port is formed between the periphery of the valve element bush and the inner wall of a level channel. When the front brake pipeline fails, pressure introduced into the proportional valve is zero, the pressure limiting rubber ring in the proportional valve is opened and does not play a role of pressure adjusting; and the rear brake pipeline is communicated, so that a rear axle has enough brake pressure.
Description
Technical field
The utility model relates to a kind of hydraulic load sensing proportioning valve that is used for motor vehicle braking system.
Background technology
The braking load sensing valve is the critical component in the brake system of car; It mainly acts on is the line pressure of the forward and backward axle in the reasonable distribution hydraulic braking process; Make automobile at glancing impact, rear axle is never by locking, and can obtain the brake-pipe pressure of ideal Distribution.But when existing front axle brake malfunctioning at present, rear axle because the brake-pressure that obtains to compare front axle little, and cause situation about can't in time brake.
For this reason, existing hydraulic load sensing proportioning valve also need be done further improvement.
Summary of the invention
The utility model technical matters to be solved is to above-mentioned prior art present situation a kind of hydraulic load sensing proportioning valve that is used for motor vehicle braking system to be provided; When preceding brake piping is effective; This hydraulic load sensing proportioning valve can be regulated rear brake duct road pressure well; And can not make the rear axle locking, and when preceding brake piping lost efficacy, rear axle had enough brake-pressures equally.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: a kind of hydraulic load sensing proportioning valve that is used for motor vehicle braking system; It is characterized in that: comprise valve casing; The pressure output that have pressure introduction port, the pressure port that is communicated with preceding brake piping on the valve casing, is communicated with the rear brake duct road; Described pressure introduction port has the horizontal channel that communicates with aforementioned each mouthful in the said valve casing between pressure port and pressure output, be provided with in this horizontal channel and feel and carry the spool that lever links to each other; This spool is separated into pressure input cavity that communicates with pressure introduction port and the pressure output cavity that communicates with pressure output with the horizontal channel; The spool middle part has annular convex shoulder, and this annular convex shoulder is positioned at the pressure input cavity, and valve core upper sleeve is provided with the pressure limiting apron; Sway through spool can make the blocking-up of pressure limiting apron or be communicated with said pressure input cavity and pressure output cavity; Also be arranged with valve core housing on the said spool, form the gap between the spool perisporium in valve core housing inwall and annular convex shoulder left side, this gap is communicated with the pressure input cavity; Also be arranged with on the said spool and make spool and valve core housing be kept away from the spring of trend, form the pressure chamber that independently is communicated with between said valve core housing periphery and the horizontal channel inwall with pressure port.
The right-hand member perisporium of above-mentioned spool is provided with annular mounting groove; Said pressure limiting apron is arranged in this annular mounting groove; Under spool moves to right state; The left inwall of pressure limiting apron contacts and said pressure input cavity and pressure output cavity is blocked with the right inwall of annular mounting groove, and under the state that spool moves to left, the right outer wall of pressure limiting apron contacts with annular mounting groove left side inwall and said pressure input cavity and pressure output cavity are communicated with.The convenient installation of this structure pressure limiting apron,
The left inwall of above-mentioned pressure limiting apron has the arc protuberance that is provided with along the circle spacing.Owing to have the gap between the arc protuberance, so hydraulic oil can pass between the arc protuberance, when the left inwall of right outer wall and annular mounting groove of pressure limiting apron contacts, and pressure input cavity and the just conducting of pressure output cavity.
Also have outer blocking shoulder on the above-mentioned spool, said spring is supported between the right side wall and outer blocking shoulder of valve core housing.
Be provided with seal ring between the right ends of above-mentioned valve core housing and the horizontal channel, the perisporium at valve core housing middle part is provided with circular groove, forms said pressure chamber between this circular groove and the horizontal channel inwall.Right ends at valve core housing is provided with the independence that seal ring is guaranteed pressure chamber.
For ease of each parts of assembling in valve casing; Above-mentioned valve casing is made up of main valve body and valve gap, and main valve body has the cavity of left end opening, and valve gap has the axis hole that axially runs through; Valve gap is threaded on the left end opening of main valve body, and the left end of said spool links to each other with a sense year lever after passing valve gap.
Compared with prior art; The advantage of the utility model is: the present invention is except the function that possesses general hydraulic load sensing proportioning valve distribution oil pressure; Also preceding brake piping is incorporated into hydraulic load sensing proportioning valve in addition; Utilize the equilibrium relation of inner related device application force, play the function of long-range pressure regulation; When preceding brake piping was effective, hydraulic load sensing proportioning valve can be regulated rear brake duct road pressure well, and can not make the rear axle locking; When preceding brake piping lost efficacy, the pressure of introducing hydraulic load sensing proportioning valve was with regard to vanishing, and at this moment, the inner original force balance relation of hydraulic load sensing proportioning valve is destroyed, and the inner pressure limiting apron of hydraulic load sensing proportioning valve is just opened so, does not play the pressure regulation effect; The rear brake duct road will lead directly to, and rear axle will have enough brake-pressures.
Description of drawings
Fig. 1 is the utility model embodiment scheme drawing;
Fig. 2 is the structure cutaway view (remove sense and carry lever) of the utility model embodiment.
Fig. 3 is the A place enlarged drawing of Fig. 2.
The specific embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
Shown in Fig. 1～3, be the embodiment of the utility model.
A kind of hydraulic load sensing proportioning valve that is used for motor vehicle braking system comprises valve casing 1, and valve casing 1 is made up of main valve body 11 and valve gap 12; Main valve body 11 has the cavity of left end opening; Valve gap 12 has the axis hole that axially runs through, and valve gap 12 is threaded on the left end opening of main valve body 11
The pressure output 4 that have pressure introduction port 2, the pressure port 3 that is communicated with preceding brake piping on the valve casing 1, is communicated with the rear brake duct road; Pressure introduction port 2 is between pressure port 3 and pressure output 4; Has the horizontal channel 5 that communicates with aforementioned each mouthful in the valve casing 1; Be provided with in this horizontal channel 5 and feel and carry the spool 7 that lever 6 links to each other, the left end of spool 7 links to each other with a sense year lever 6 after passing valve gap.
Also be arranged with valve core housing 9 on the spool 7; Form gap X between spool 7 perisporiums in valve core housing 9 inwalls and annular convex shoulder 71 left sides; This gap X is communicated with pressure input cavity 51; Also be arranged with on the spool 7 and make spool 7 and valve core housing 9 be kept away from the spring 10 of trend, with the pressure chamber 53 that independently is communicated with in formation between valve core housing 7 peripheries and horizontal channel 5 inwalls with pressure port 3.
Also have outer blocking shoulder 73 on the spool 7, spring 10 is supported between the right side wall and outer blocking shoulder 73 of valve core housing 9.Be provided with seal ring 91 between the right ends of valve core housing 9 and the horizontal channel 5, the perisporium at valve core housing 9 middle parts is provided with circular groove 92, forms pressure chamber 53 between this circular groove 92 and horizontal channel 5 inwalls.
The principle of work and the process of this prefill valve are following:
When just stepping on brake pedal; The hydraulic efficiency pressure system internal pressure begins to rise; This moment, spool 7 received power to the right; I.e. effect acts on spool thrust left with annular convex shoulder 71 hydraulic pressure and 10 pairs of spools 7 of spring thrust sum to the right of spool greater than hydraulic oil in the pressure output cavity 52, so spool 7 positions are motionless, and just input pressure equals from the pressure of pressure output 4 outputs; And valve core housing 9 receives power left, and pressure chamber 53 acts on valve core housing 9 power and 10 pairs of valve core housings 9 of spring power sum to the right to the right greater than pressure input cavity 51 interior hydraulic oil effect and valve core housing 9 power left, so valve core housing 9 remains static.
Along with pedal ground further treads in; Input pressure and delivery pressure will further increase (but input pressure is all the time greater than delivery pressure); When reaching a certain setting value (break pressure), hydraulic oil acts on spool thrust left greater than annular convex shoulder 71 hydraulic pressure and spring 10 pair spools 7 to the right the thrust sum of effect with spool in the pressure output cavity 52, and spool 7 will move right; Pressure limiting apron 8 also will be closed and occluding pressure input cavity 51 and pressure output cavity 52, reach a dynamic balance state; But along with the continuous variation of spool 7 suffered external loads (unloaded and fully loaded), original balance will be broken, and spool 7 is sway, and to seek new balance position, the size from the pressure of pressure output 51 outputs also will constantly change like this.In addition; Valve core housing 9 receives power left; And pressure chamber 53 acts on valve core housing 9 power and 10 pairs of valve core housings 9 of spring power sum to the right to the right and acts on valve core housing 9 power left greater than pressure input cavity 51 interior hydraulic oil, so valve core housing 9 remains static all the time.
Preceding brake chamber inefficacy when master brake cylinder; Be that the pressure that acts on valve core housing 9 in the pressure chamber 53 equals zero; Hydraulic oil acts on valve core housing 9 power left greater than 10 pairs of valve core housings 9 of spring power to the right in the valve core housing 9 pressure input cavities 51 so, and transmits a power to the right through spring 10 compressions to spool 7, and this moment, spool 7 suffered power to the right acted on spool thrust left greater than hydraulic oil in the pressure output cavity 52 all the time; Just no matter under unloaded and full load conditions; Spool 7 leans against low order end all the time, and pressure limiting apron 8 is opened, and equals the pressure of pressure introduction port 51 inputs all the time from the pressure of pressure output 52 outputs; Guarantee that rear axle has enough brake-pressures equally when preceding brake piping lost efficacy.
Claims (6)
1. hydraulic load sensing proportioning valve that is used for motor vehicle braking system; It is characterized in that: comprise valve casing (1); The pressure port (3) that have pressure introduction port (2) on the valve casing (1), is communicated with, the pressure output (4) that is communicated with the rear brake duct road with preceding brake piping; Said pressure introduction port (2) is positioned between pressure port (3) and the pressure output (4); Has the horizontal channel (5) that communicates with aforementioned each mouthful in the said valve casing (1); Be provided with in this horizontal channel (5) and feel and carry the spool (7) that lever (6) links to each other, this spool (7) is separated into the pressure input cavity (51) that communicates with pressure introduction port (2) with horizontal channel (5) and reaches the pressure output cavity (52) that communicates with pressure output (4), has annular convex shoulder (71) in the middle part of the spool (7); This annular convex shoulder (71) is positioned at pressure input cavity (51); Be arranged with pressure limiting apron (8) on the spool (7), the sway through spool (7) can make pressure limiting apron (8) block or be communicated with said pressure input cavity (51) and pressure output cavity (52), also is arranged with valve core housing (9) on the said spool (7); Form gap (X) between spool (7) perisporium in valve core housing (9) inwall and annular convex shoulder (71) left side; This gap (X) is communicated with pressure input cavity (51), also is arranged with on the said spool (7) to make spool (7) and valve core housing (9) be kept away from the spring (10) of trend, forms the pressure chamber (53) that independently is communicated with pressure port (3) between said valve core housing (7) periphery and horizontal channel (5) inwall.
2. the hydraulic load sensing proportioning valve that is used for motor vehicle braking system according to claim 1; It is characterized in that: the right-hand member perisporium of said spool (7) is provided with annular mounting groove (72); Said pressure limiting apron (8) is arranged in this annular mounting groove (72); Under spool (7) moves to right state; The left inwall of pressure limiting apron (8) contacts with the right inwall of annular mounting groove (75) and said pressure input cavity (51) and pressure output cavity (52) is blocked, and under the state that spool (7) moves to left, the right outer wall of pressure limiting apron (8) contacts with the left inwall of annular mounting groove (75) and said pressure input cavity (51) and pressure output cavity (52) are communicated with.
3. the hydraulic load sensing proportioning valve that is used for motor vehicle braking system according to claim 2 is characterized in that: the left inwall of said pressure limiting apron (8) has the arc protuberance (81) that is provided with along the circle spacing.
4. the hydraulic load sensing proportioning valve that is used for motor vehicle braking system according to claim 1 is characterized in that: also have outer blocking shoulder (73) on the said spool (7), said spring (10) is supported between the right side wall and outer blocking shoulder (73) of valve core housing (9).
5. the hydraulic load sensing proportioning valve that is used for motor vehicle braking system according to claim 1; It is characterized in that: be provided with seal ring (91) between the right ends of said valve core housing (9) and horizontal channel (5); The perisporium at valve core housing (9) middle part is provided with circular groove (92), forms said pressure chamber (53) between this circular groove (92) and horizontal channel (5) inwall.
6. according to the described hydraulic load sensing proportioning valve that is used for motor vehicle braking system of arbitrary claim in the claim 1～5; It is characterized in that: said valve casing (1) is made up of main valve body (11) and valve gap (12); Main valve body (11) has the cavity of left end opening; Valve gap (12) has the axis hole that axially runs through, and valve gap (12) is threaded on the left end opening of main valve body (11), and the left end of said spool (7) links to each other with a sense year lever (6) after passing valve gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120309131XU CN202243441U (en) | 2011-08-22 | 2011-08-22 | Hydraulic load-sensing proportional valve used for vehicle brake system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120309131XU CN202243441U (en) | 2011-08-22 | 2011-08-22 | Hydraulic load-sensing proportional valve used for vehicle brake system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202243441U true CN202243441U (en) | 2012-05-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120309131XU Expired - Fee Related CN202243441U (en) | 2011-08-22 | 2011-08-22 | Hydraulic load-sensing proportional valve used for vehicle brake system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202243441U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106379301A (en) * | 2016-11-15 | 2017-02-08 | 安徽江淮汽车股份有限公司 | II-type double-brake circuit with invalidation protection and braking method |
| CN108995640A (en) * | 2018-09-07 | 2018-12-14 | 杭叉集团股份有限公司 | A kind of vehicle, braking force distribution system and its sense carry deformation enlarger |
-
2011
- 2011-08-22 CN CN201120309131XU patent/CN202243441U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106379301A (en) * | 2016-11-15 | 2017-02-08 | 安徽江淮汽车股份有限公司 | II-type double-brake circuit with invalidation protection and braking method |
| CN108995640A (en) * | 2018-09-07 | 2018-12-14 | 杭叉集团股份有限公司 | A kind of vehicle, braking force distribution system and its sense carry deformation enlarger |
| CN108995640B (en) * | 2018-09-07 | 2023-07-07 | 杭叉集团股份有限公司 | Vehicle, braking force distribution system and load sensing deformation amplifying mechanism thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20180822 |